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NSWInformation Processes and TechnologyQuick questions
Core: Information Systems and Databases
Quick questions on Storage and retrieval methods in HSC Information Processes and Technology
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are backup procedures?Show answer
Backup copies data so it can be restored after loss from hardware failure, error, attack or disaster. A full backup copies everything, which is thorough but slow and large. An incremental backup copies only what changed since the last backup of any kind, which is fast but needs the full backup plus every increment to restore. A differential backup copies everything changed since the last full backup, a middle ground.
What is encryption of stored data?Show answer
Encryption scrambles data using a key so it is unreadable without the matching key. Encrypting stored data (encryption at rest) means that if a disk, backup tape or database file is stolen, the thief gets ciphertext, not usable information. This is a core control for protecting personal and financial data and a standard expectation under privacy obligations.
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